var num = 0;
var gtime = null;
var atstart = true;
function getNextSlide(pressed){
		var simg = num + 1;		 
		atstart = false;		 
		if(num == (slideImages.length-1)){
         document.getElementById("slideImage").src = slideImages[0].src;
		  document.getElementById("controls").innerHTML = "<a href='javascript:getPrevSlide()'>&lt;&lt;&nbsp;Previous</a> <strong>Slideshow</strong> <a href='javascript:beginShow();'>Reset</a><br />";
			clearTimeout(gtime);
			return;
		}
		else{ 
        if(pressed){
            clearTimeout(gtime);
            gtime = null;
        }
         document.getElementById("slideImage").src = slideImages[simg].src;
		 num++;
		}
		
}

function getPrevSlide(){
	 if(atstart) return;
		var simg = num - 1;
		clearTimeout(gtime);
		gtime = null;
    document.getElementById("slideImage").src = slideImages[simg].src;
		if(simg == 0){
			atstart = true;
		  return;
		}
		
		num--;
}

function beginShow(){
   
    clearTimeout(gtime);
	gtime = null;
    num = 0;
    atstart = true;
    document.getElementById("controls").innerHTML = "<a href='javascript:getPrevSlide()'>&lt;&lt;&nbsp;Previous</a> <strong>Slideshow</strong> <a href='javascript:getNextSlide(true)'>Next&nbsp;&gt;&gt;</a><br />";
	autoRotate();		 
}

function autoRotate(){
		getNextSlide();
		gtime = setTimeout("autoRotate()",3000);
}


function showInfo(topic){
				 //alert(topic);
				 //alert(topic == "vp");
				 if(topic == "vp"){
				 	self.location.href = self.location.href + "&vt=true";
				 }
    document.getElementById("mainContent").innerHTML =  document.getElementById(topic).innerHTML;
    document.getElementById("mainContent").style.background = "#fff";
    document.getElementById("mainContent").style.padding = 10;
}